diff --git a/org.ntlab.reverseDebugger/src/org/ntlab/reverseDebugger/CallStackView.java b/org.ntlab.reverseDebugger/src/org/ntlab/reverseDebugger/CallStackView.java
index bac8744..1aa814d 100644
--- a/org.ntlab.reverseDebugger/src/org/ntlab/reverseDebugger/CallStackView.java
+++ b/org.ntlab.reverseDebugger/src/org/ntlab/reverseDebugger/CallStackView.java
@@ -12,14 +12,17 @@
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.ui.ISharedImages;
+import org.eclipse.ui.IViewPart;
+import org.eclipse.ui.IWorkbenchPage;
+import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.part.ViewPart;
 import org.ntlab.onlineAccessor.JDIInstanceMethodCaller;
 
-public class CallStackView extends ViewPart {
-	private static TreeViewer viewer;
+public class CallStackView extends ViewPart {	
+	private TreeViewer viewer;
 	private IAction refreshAction;
-	private static CallStackModels callStackModels = new CallStackModels();
+	private CallStackModels callStackModels = new CallStackModels();
 	private JavaEditorOperator javaEditorOperator = new JavaEditorOperator();
 	public static final String ID = "org.ntlab.reverseDebugger.callStackView";
 	
@@ -48,8 +51,9 @@
 					if (value instanceof CallStackModel) {
 						CallStackModel callStackModel = (CallStackModel)value;
 						JDIInstanceMethodCaller methodExecution = callStackModel.getMethodCaller();
-						SeedAliasView.createSeedAliasesByMethodExecution(methodExecution);
-						SeedAliasView.refresh();
+						SeedAliasView seedAliasView = ((SeedAliasView)getOtherView(SeedAliasView.ID));
+						seedAliasView.createSeedAliasesByMethodExecution(methodExecution);
+						seedAliasView.refresh();
 						javaEditorOperator.openSrcFileOfMethodExecution(methodExecution, callStackModel.getCallLineNo());
 					}
 				}
@@ -88,13 +92,14 @@
 		mgr.add(refreshAction);
 	}
 	
-	public static void updateByAlias(JDIInstanceMethodCaller alias) {
+	public void updateByAlias(JDIInstanceMethodCaller alias) {
 		callStackModels.updateByAlias(alias);
 	}
 
-	public static void refresh() {
+	public void refresh() {
 		if (callStackModels.getCallStackModels().isEmpty()) {
-			JDIInstanceMethodCaller currentMe = SeedAliasView.getDebuggingMethodExecution();
+			SeedAliasView seedAliasView = ((SeedAliasView)getOtherView(SeedAliasView.ID));
+			JDIInstanceMethodCaller currentMe = seedAliasView.getDebuggingMethodExecution();
 			callStackModels.updateByDebuggerStopMethodExecution(currentMe);
 		}
 		TreeNode[] nodes = callStackModels.getCallStackModelsTreeNodes();
@@ -105,8 +110,17 @@
 		viewer.expandAll();
 	}
 	
-	public static void reset() {
+	public void reset() {
 		callStackModels.reset();
 		refresh();
 	}
+	
+	private IViewPart getOtherView(String viewId) {
+		IWorkbenchPage workbenchPage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
+		try {
+			return workbenchPage.showView(viewId);
+		} catch (PartInitException e) {
+			throw new RuntimeException(e);
+		}	
+	}
 }